I have the Commander Compass (paid version 3.3.6) app on my iPhone 4S. It's an impressive looking app - says its "Mil Spec" - however I am wonder how accurate it is. The manual says "The precision of
The combination of accelerometers and magnetic sensors means that you can compensate for the non-level-ness, which is a huge advantage over a conventional card compass. Based on some of the sensors I
Yes, averaging over time does help. Some gps's have built in time averaging to improve accuracy of saved waypoints. The elevation is not usually as accurate as the lat/lon, that comes from the method
No hi-tech required, during a sunny day when your tower's shadow is the shortest it will be pointing North. If you want to get fancy just input your Lat. Lon. Into this program and you will have your
In the Northern hemisphere, put a small stake in the ground and mark the end of the shadow, wait a few minutes and mark the end of the shadow again, the put your left foot on the first mark and the r
Larry That wouldn't work except for a few days in the summer at my old qth, on the shores of Lake Ontario (Rochester, NY) Although this morning its not much warmer here 21ºF 73 Larry K1ZW Durham, NC
Iphone uses AKM AK8975 chip to sense the earth's magnetic field (four Hall effect sensors on a chip) so GPS isn't providing compass. I would think it's pretty accurate. Sure there's software and cali
If they have an app and GPS why on earth would they want to sense magnetic North? The nice thing about my GPS in the airplane is I don't have to convert to get true North. With the magnetic compass y
Your plane is moving, so differential measurements using GPS works. Human standing still, ain't. -kevin ad6z _______________________________________________ __________________________________________
But the satellites are. New hand helds can tell the direction you are moving with just one step. My Garmin knows which way it's pointed when you turn it on. 73 Roger (K8RI) __________________________
More than that, as I learned in designing mobile and portable commercial equipment, cars and airplanes have pretty much infinite power available, while the battery-powered iPhone does not. Radios (es
My Garmin portable knows which way it's pointed when it's turned on setting on the desk although it may take it minute. All of them I've used at most required a movement of no more than a couple of f
yah, the magnetic pole has accelerated to about 20 miles per year. _______________________________________________ _______________________________________________ TowerTalk mailing list TowerTalk@con
My iPhone4 iOS5 comes up 90 degrees off about half the time. Should be pointing N, but is pointing E. It never did that with a previous OS. 73, Mike NF4L _____________________________________________
Very interesting, Mike....the testing against known headings that I did on MY iPhone was only AFTER updating it to iOS5 (which was a horrible mistake, but that's a story for a different reflector). _
When IOS 4 first came out, I made the mistake of updating my old iPhone 3G. I soon discovered how to go back to older versions of the OS. There are lots of websites with instructions on how to do tha
interesting. I didn't realize that. My Garmin Vista H has electronic compass separate from GPS. (not all Garmin do) so it has some kind of magnetic sensors. I know I can turn it on and off separately
One part of that that is relevant here is those using an Apple Os is that Apple has said they make no attempt to stay compatible with any 3rd party apps. Remember that if you have an app you depend o
Nor should they. It would be like trying to dip the ocean dry with a teaspoon. Apple does have a set of guideline an app must meet before it's allowed in the App Store. Developers, whether for Apple
My droid seems to be accurate, if I do the calibration. Does the iphone have a calibration feature? Mike AD6AA _______________________________________________ ________________________________________